The coefficient of Spelling Errors is positive and statistically significant for DVDs suggesting that an increase in the proportion of spelling mistakes in the content of the reviews decreases product sales for some products whose quality can be assessed only after purchase. However, for hedonic like products such as audio-video players and digital cameras whose quality can be assessed prior to purchase, the proportion of spelling errors in reviews does not have a statistically significant impact on sales. For all three categories, we find that this result is robust to different specifications of normalizing the number of spelling errors such as normalizing by the number of characters, words or sentences in a given review. In sum, our results provide support for Hypotheses 1a to 1c.